Answer:
X represents a textbook
Y represents the number of pages in a textbook
Explanation:
If X is to = 1 Textbooks, Y would be 848 pages
If X is to = 2 Textbooks, Y would be 1696 pages
If X is to = 3Textbooks, Y would be 2544 pages
If X is to = 4 Textbooks, Y would be 3392 pages
I do not think I am wrong but i am sorry if I am!
Because door of world is open for all..
and so U.S entered WW1